# A013391 (b-file synthesized from sequence entry) 0 0 1 3 2 23 3 721 4 25199 5 1716121 6 141920855 7 20103619537 8 4016386229855 9 1241116799607721 10 494609567396520071 11 244232906612554953633 12 140315440295583485315151 13 92810530303082004433849401